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1981 Cadillac DeVille

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 1981 Cadillac DeVille

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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Hertz MP 250 D4.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 4-ohm Car Subwoofer

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1200W Peak (600W RMS) 10" Mille Pro Series Dual 4-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Pressed Pulp Fiber cone
• Butyl Rubber surround
• Mount depth: 5.55"
• Sensitivity: 83.5 dB

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List price $575.00
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Hertz DS 25.3

600W Peak (150W RMS) 10" Dieci Series Single 4-ohm Subwoofer

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600W Peak (150W RMS) 10" Dieci Series Single 4-ohm Subwoofer

• Peak Power: 600 watts
• RMS Power: 150 watts
• Impedance: Single 4 ohm
• Mica Injected Polypropylene - MIPP cone
• Butyl Rubber surround
• Mount depth: 4.1"
• Sensitivity: 89 dB

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List price $145.00
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Hertz DPower 1

600W Peak (300W RMS) Class D DPOWER Series Monoblock Car Amplifier

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600W Peak (300W RMS) Class D DPOWER Series Monoblock Car Amplifier

• 180 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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Available Offers (2) for Hertz DPower 1
FREE Belva Amp Kit at Checkout!
Save 30% off an NVX XKIT82 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT82 Amp Kit! No code needed — discount applies automatically at checkout.

Hertz DS 30.3

1000W Peak (250W RMS) 12" Dieci Series Dual 4-ohm Car Subwoofer

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1000W Peak (250W RMS) 12" Dieci Series Dual 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP cone
• Butyl Rubber surround
• Mount depth: 4.7"
• Sensitivity: 91 dB

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List price $165.00
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Hertz HCP 4M

760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

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760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

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List price $470.00
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Hertz MPBX 300 S2

1000 Peak (500 RMS) 12" S2 Series Single 2 ohms Subwoofer Loaded Enclosure

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1000 Peak (500 RMS) 12" S2 Series Single 2 ohms Subwoofer Loaded Enclosure

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Single 2 ohm
• Polypropylene Cone
• Rubber Surround

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List price $925.00
-14% $799.99

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Hertz SS 15 D2

2400W Peak (1200W RMS) 15" SPL Show Series Dual 2-ohm Car Subwoofer

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2400W Peak (1200W RMS) 15" SPL Show Series Dual 2-ohm Car Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper cone
• Foam surround
• Mount depth: 7.4"

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List price $580.00
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Hertz HCP 5D

1500W Peak (750W RMS) Class D Hertz Compact Power (HCP) Series 5-Channel Full Range Car Amplifier

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1500W Peak (750W RMS) Class D Hertz Compact Power (HCP) Series 5-Channel Full Range Car Amplifier

• 55 watts x 4 channel + 160 watts x 1 channel @ 4 ohm
• 90 watts x 4 channel + 280 watts x 1 channel @ 2 ohm
• Bridged: 180 watts x 2 channel + 160 watts x 1 channel @ 4 ohm
• Bridged: 180 watts x 2 channel + 280 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

Save 30% off an NVX XKIT86 Amp Kit at Checkout!
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List price $600.00
-8% $549.99

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Hertz DBX 25.3

600W Peak (150W RMS) Loaded Single 10" Sealed Enclosure

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600W Peak (150W RMS) Loaded Single 10" Sealed Enclosure

• Sealed enclosure with 1 10" DBX Series Subwoofer
• 150 watts RMS (600 watts Peak)
• Final Impedance: 4-ohm
• Dimensions: 17.4" L x 11.7" H x 8.9" W

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List price $280.00
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Hertz MG 15 BASS

8000W Peak (2000W RMS) 15" SPL Monster Series Dual 1-ohm Car Subwoofer

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8000W Peak (2000W RMS) 15" SPL Monster Series Dual 1-ohm Car Subwoofer

• Peak Power: 8000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Water-repellent pressed paper cone
• High-density Foam surround
• Sensitivity: 94 dB

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List price $1000.00
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Hertz HMP 4D

600W Peak (260W RMS) Class D 4 HMP Series 4-Channel Full Range Motorcycle and Powersports Amplifier

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600W Peak (260W RMS) Class D 4 HMP Series 4-Channel Full Range Motorcycle and Powersports Amplifier

• 4 Channel: 50 watts x 4 channel @ 4 ohm
• 4 Channel: 65 watts x 4 channel @ 2 ohm
• 3 Channel: 50 watts x 2 channel @ 4 ohm + 130 watts x 1 channel @ 4 ohm
• 3 Channel: 65 watts x 2 channel @ 2 ohm + 130 watts x 1 channel @ 4 ohm
• 2 Channel: 130 watts x 2 channel @ 4-ohm
• Total RMS Power: 260 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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• 4 Channel: 50 watts x 4 channel @ 4 ohm
• 4 Channel: 65 watts x 4 channel @ 2 ohm
• 3 Channel: 50 watts x 2 channel @ 4 ohm + 130 watts x 1 channel @ 4 ohm
• 3 Channel: 65 watts x 2 channel @ 2 ohm + 130 watts x 1 channel @ 4 ohm
• 2 Channel: 130 watts x 2 channel @ 4-ohm
• Total RMS Power: 260 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Hertz HMR BT

Square Gauge Marine and Powersports Bluetooth Receiver

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Square Gauge Marine and Powersports Bluetooth Receiver

• Square Gauge Marine Bluetooth Receiver
• Features IP67 pure marine protection grade
• Qualcomm aptX audio codec for high performance audio
• Qualcomm aptX audio codec for high performance audio
• 1 set of 4 volts preamp outputs (left and right)

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List price $165.00
-9% $149.99

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• Square Gauge Marine Bluetooth Receiver
• Features IP67 pure marine protection grade
• Qualcomm aptX audio codec for high performance audio
• Qualcomm aptX audio codec for high performance audio
• 1 set of 4 volts preamp outputs (left and right)

Hertz MP 250 D2.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

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1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Pressed Pulp Fiber cone
• Butyl Rubber surround
• Mount depth: 5.55"
• Sensitivity: 83.5 dB

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List price $575.00
$549.99

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Hertz MP 300 D4.3

1200W Peak (600W RMS) 12" Mille Pro Series Dual 4-ohm Car Subwoofer

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1200W Peak (600W RMS) 12" Mille Pro Series Dual 4-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Mineral-Injected Paper cone
• Butyl Rubber surround
• Mount depth: 6.46"
• Sensitivity: 86 dB

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List price $676.00
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Hertz CS 250 S2

600W Peak (300W RMS) 10" Cento Series Single 2-ohm Shallow Mount Car Subwoofer

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600W Peak (300W RMS) 10" Cento Series Single 2-ohm Shallow Mount Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Single 2 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 4.53"
• Sensitivity: 84 dB

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List price $315.00
-11% $279.99

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Hertz CS 250 S4

600W Peak (300W RMS) 10" Cento Series Single 4-ohm Shallow Mount Car Subwoofer

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600W Peak (300W RMS) 10" Cento Series Single 4-ohm Shallow Mount Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 4.53"
• Sensitivity: 84 dB

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List price $315.00
-11% $279.99

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Hertz Venezia V5C Compact

1010W RMS Venezia Series Class-D 5-Channel Marine Amplifier

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1010W RMS Venezia Series Class-D 5-Channel Marine Amplifier

• 5 Channel: 80 watts x 4 channel + 330 watts x 1 channel (at 4 ohms)
• 5 Channel: 115 watts x 4 channel + 550 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel + 330 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel (at 4 ohms) + 550 watts x 1 channel (at 2 ohms)
• Total RMS Power: 1010 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 5 Channel: 80 watts x 4 channel + 330 watts x 1 channel (at 4 ohms)
• 5 Channel: 115 watts x 4 channel + 550 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel + 330 watts x 1 channel (at 4 ohms)
• 3 Channel: 230 watts x 2 channel (at 4 ohms) + 550 watts x 1 channel (at 2 ohms)
• Total RMS Power: 1010 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Hertz HHP 14

Power and Ground Cable for SP4.900

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Power and Ground Cable for SP4.900

• Power and ground cable
• Use for installing Hertz SP4.900 amplifier
• Plug and play installation
• Color coded wires

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• Power and ground cable
• Use for installing Hertz SP4.900 amplifier
• Plug and play installation
• Color coded wires

Hertz HCP 2X

800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

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800W Peak (320W RMS) Class AB Hertz Compact Power (HCP) Series 2-Channel Full Range Car Amplifier

• 100 watts x 2 channel @ 4 ohm
• 160 watts x 2 channel @ 2 ohm
• Bridged: 320 watts x 1 channel @ 1 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 2-Channel-Channel Amplifier

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List price $325.00
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Hertz Venezia V5

1700W RMS Class D Venezia Series 5-Channel Marine Amplifier

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1700W RMS Class D Venezia Series 5-Channel Marine Amplifier

• 130 watts x 4 channel + 490 watts x 1 channel @ 4 ohm
• 220 watts x 4 channel + 820 watts x 1 channel @ 2 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm + 490 watts x 1 channel @ 4 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm + 820 watts x 1 channel @ 2 ohm
• Total RMS Power: 1700 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 130 watts x 4 channel + 490 watts x 1 channel @ 4 ohm
• 220 watts x 4 channel + 820 watts x 1 channel @ 2 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm + 490 watts x 1 channel @ 4 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm + 820 watts x 1 channel @ 2 ohm
• Total RMS Power: 1700 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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    FAQ for Universal-Fit Audio & Electronics in 1981 DeVille

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 Cadillac DeVille?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your DeVille.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.